Improvement in rotary engines



UNITED STATES PATENT OFFICE.

WINSLOW P. EAYRS, OF BOSTON, MASSACHUSETTS, ASSIGNOR OF ONE' HALF HIS RIGHT TO TIMOTHY E. STUART, OF SAME PLAGE.

IMPROVEMENT IN ROTARY ENGINES.

Specification forming part of Letters Patent No. 141,1 2S, dated'July 22, 1873 application iiled May 14, 1873.

To all whom it may concern:

Be it known that I, WlNsLOW l?. EAYRS of Boston, in the county of Suffolk and in the State of Massachusetts, have invented certain new and useful Improvements in Rotary Engine; and do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings and to the letters of reference marked thereon, making a part of this specification.

The nature of my invention consists in the construction and arrangement of a rotary engine, as will be hereinafter more fully set forth.

In order to enable others skilled in the art .to which my invention appertains to make bearings a a I propose to make of ground or pulverized iiint and clay, molded and baked.

This composition is capable of being highly polished, has great tenacity, and is almost impossible, on account of its hardness, to wear. The wheel A is provided with a circumferential steam channel or passage, b, in which, at suitable regular intervals, are abutments d d, in each of which is a roller, c, extending across the channel b, and forced outward by steam to form packing, the steam passing into the abutments under the rollers through suitable steam-passages. At opposite points on the wheel A are arranged segmental casin gs D D, each having a valve-box, E, withinwhich is hung a valve, G, these valves and boxes being constructed in the same manner as described in a former patent granted to me March 18, 1873. For better convenience in describing the operation of the engine, I have marked one valve-box E and the other E', andthe corresponding valves Gand G. H H are the steam-inlets into the valve-boxes; h and h, the steam-passages in the valves, and I I the exhaust or outlet ports. In front of each abutment d, in the steam-channel b, on the wheel, is secured a cleat, f, which is the thickness of the passage in the valve..

The steam passes in through the inlet I-I and' through the port lr in the valve G, thence into the steam-channel b, striking against the abutment d directly opposite,forcin g the wheel A around to the exhaust I, and passes out. At the same time steam passes through the inlet H into the valve-port h. When the valvc'G is on the cleat f, as shown in Fig. 1,

the steam is shut off at the mouth of the port h, and allows the use ofthe expansion ofthe steamwhile the wheel turns to bring the valve G over the next abutment; therefore, the

valve G is working on expansion when the valve G is working on full steam; and-vice versa, the steam in the valve-ports h and It forming a piston at m, to keep the valve in position against the wheel.

Having thus fully described my invention,

what I claim as new, and desire to secure by Letters- Patent, is- Y 1. The cleats f f, arranged in front of the abutments d d, in the steam-channel of the wheel A, and operating on the valves G G', substantially as and for the purposes herein set forth. v

2. The combination of the wheel A having steam-channel l), abntments d, rollers e, and cleats f, the casings D, valve-boxes E E', valves G G', inlets 'H H', and outlets I I', all constructed and arranged substantially as and for the purposes herein set forth.

Y In testimony that I claimt-he foregoing l have hereunto sc .t my hand this 11th day ot April, 1873. WIN SLOW l?. EAYRS.

Witnesses ALPEEUS M; LEAcH, GEORGE TESCY. 

